#!/usr/bin/env node
'use strict';

/**
 * prove-park-weather — DOES PARK GEOMETRY AND AIR READ TOTAL BASES?
 *
 * Run through the two-part gate like every other factor, with one addition that
 * changes the answer: the rows are CLUSTERED BY GAME. Park and weather assign a
 * single value to every hitter in a ballpark on a night, so eighteen prop rows
 * from one game are one reading of that game's conditions. Resampling rows would
 * treat them as eighteen and hand back an interval far tighter than the evidence
 * supports — which is how a gate passes a factor on sample it never had.
 *
 *   SUPABASE_URL=... node scripts/prove-park-weather.js
 */

require('dotenv').config();
const { createClient } = require('@supabase/supabase-js');
const pw = require('../src/services/model/parkWeather');
const fg = require('../src/services/model/factorGate');
const tl = require('../src/services/model/testLedger');
const { knownNumber } = require('../src/utils/known');
const { paginate } = require('../src/utils/safePaginate');
const { uniqueKeyFor } = require('../src/utils/tableKeys');

const SB_URL = process.env.SUPABASE_URL;
const SB_KEY = process.env.SUPABASE_SERVICE_ROLE_KEY || process.env.SUPABASE_SERVICE_KEY;
const PAGE = 1000;

// ── THE SAFE WALK (Fix A2/A2b) ────────────────────────────────────────────
// This script used to walk pages with `.range()` and NO ORDER BY. Measured on
// production, that returned the correct row COUNT and the wrong ROWS: up to
// 33.6% of a read came back twice while an equal share never came back at all,
// so `rows.length` looked perfect while a fifth of the sample was missing.
//
// `pageSafe` routes every read through `src/utils/safePaginate`: a stable ORDER
// BY on the table's real UNIQUE key — single OR composite, looked up from
// `src/utils/tableKeys` rather than assumed — a runtime tuple-uniqueness check,
// and a THROWN error instead of a silent stop. The old unordered helper is gone
// rather than left beside it, because a dead broken helper is an invitation.
async function pageSafe(sb, table, select, apply, key = uniqueKeyFor(table)) {
  return paginate(() => apply(sb.from(table).select(select)),
    { key, pageSize: PAGE, label: `${table}` });
}

/** THE MEASURED READS — main() and the harness call the same functions. */
const READS = {
  ledger: (sb) => pageSafe(sb, 'ledger_entries',
    'id, game_id, player_key, player_name, line, side, outcome, game_date, p_win, quarantine_reason',
    (q) => q.eq('sport', 'mlb').is('user_id', null).eq('stat', 'total_bases')
      .in('outcome', ['hit', 'miss'])),
};

/** Hit-type shares → expected total bases, so a reshape has a consequence. */
const tbFromShares = (s) => s.single + 2 * s.double + 3 * s.triple + 4 * s.home_run;

async function main() {
  const sb = createClient(SB_URL, SB_KEY, { auth: { persistSession: false } });

  const parks = await pageSafe(sb, 'park_dimensions', '*', (q) => q.eq('sport', 'mlb'));
  const byVenue = new Map();
  for (const p of parks) if (!byVenue.has(p.venue_id)) byVenue.set(p.venue_id, p);
  const league = pw.leagueGeometry([...byVenue.values()]);

  const ctx = await pageSafe(sb, 'game_context', 'game_id, venue_id, wx_temp_f, wx_wind_speed_mph, wx_wind_direction_deg', (q) => q);
  const ctxBy = new Map(ctx.map((c) => [c.game_id, c]));

  const led = await pageSafe(sb, 'ledger_entries',
    'id, game_id, game_date, player_key, stat, line, side, outcome, quarantine_reason, p_win, proj_hits_p_over',
    (q) => q.eq('sport', 'mlb').is('user_id', null).eq('stat', 'total_bases').in('outcome', ['hit', 'miss']));
  const clean = led.filter((r) => !(r.quarantine_reason || '').startsWith('nontakeable_book'));

  // League-typical hit-type shares — the shape the atom reshapes.
  const BASE_SHARES = { single: 0.655, double: 0.195, triple: 0.017, home_run: 0.133 };
  const baseTb = tbFromShares(BASE_SHARES);

  const loss = { no_context: 0, no_venue: 0, no_park: 0, no_baseline: 0, kept: 0 };
  const rows = [];
  for (const r of clean) {
    const c = ctxBy.get(r.game_id);
    if (!c) { loss.no_context += 1; continue; }
    if (c.venue_id == null) { loss.no_venue += 1; continue; }
    const dims = byVenue.get(c.venue_id);
    if (!dims) { loss.no_park += 1; continue; }

    const baseline = knownNumber(r.p_win);
    if (baseline === null) { loss.no_baseline += 1; continue; }

    const read = pw.parkWeatherRead({ dims, wx: c, league });
    if (!read) { loss.no_park += 1; continue; }

    // The atom reshapes hit type; the consequence for total bases is the ratio
    // of expected bases per hit under the reshaped shape.
    const shaped = pw.applyToShares(BASE_SHARES, read);
    const ratio = tbFromShares(shaped) / baseTb;
    const conditioned = Math.max(0.01, Math.min(0.99, baseline * ratio));

    rows.push({
      cluster: r.game_id,               // ONE reading per game — the whole point
      baseline,
      conditioned,
      won: r.outcome === 'hit' ? 1 : 0,
    });
    loss.kept += 1;
  }

  // Cumulative Bonferroni across the programme lifetime — this hypothesis is
  // one more test, and the bar rises for it like every other.
  const mc = await tl.recordAndCount(tl.supabaseStore(sb), [
    { sport: 'mlb', stat: 'total_bases', archetype: null, interaction: 'factor:park_weather_hit_type', target: 'outcome' },
  ]);
  const verdict = fg.adjudicate(rows, {
    factor: 'park_weather_hit_type',
    stat: 'total_bases',
    cumulativeTests: mc.cumulative_tests,
  });

  const games = new Set(rows.map((r) => r.cluster)).size;
  const venues = new Set(clean.map((r) => ctxBy.get(r.game_id)?.venue_id).filter((v) => v != null)).size;

  console.log(JSON.stringify({
    clean_settled_tb_rows: clean.length,
    rows_built: rows.length,
    row_loss: loss,
    distinct_games: games,
    distinct_venues: venues,
    rows_per_game: games ? Math.round((rows.length / games) * 10) / 10 : null,
    cumulative_tests: mc.cumulative_tests,
    verdict,
    honest_note: 'sample judged in GAMES, not prop rows — park and weather vary per game',
  }, null, 2));
  process.exit(0);
}

if (require.main === module) {
  main().catch((e) => { console.error(e); process.exit(1); });
}

// Exported so the read-integrity harness measures THE REAL FUNCTION.
module.exports = { READS };